Did some extensive searching and couldn't find anything for these specific codes. B1000 3C ECU performance and B2470 Symptom 4, Cellular Antenna Open Circuit. Are they related? Some suggested cleaning the ECU harness and some to replace it. As for B2470, the shark fin antenna serms intact. I took the antenna fully apart and all seems fine. All is working fine in the car, GPS, XM, phone, so not sure what the issue might be. TIA.
Edit: B2470 is definitely OnStar issue as it is not working. Will test as described here
https://r.tapatalk.com/shareLink/to...&share_fid=17772&share_type=t&link_source=app
Edit: B2470 is definitely OnStar issue as it is not working. Will test as described here
https://r.tapatalk.com/shareLink/to...&share_fid=17772&share_type=t&link_source=app
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